Make 'will-change: contents' suppress compositing in subtree

Source/core/rendering/style/StyleRareInheritedData.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 72 matching lines @@
     , m_textAlignLast(RenderStyle::initialTextAlignLast())
     , m_textJustify(RenderStyle::initialTextJustify())
     , m_textOrientation(TextOrientationVerticalRight)
     , m_textIndentLine(RenderStyle::initialTextIndentLine())
     , m_textIndentType(RenderStyle::initialTextIndentLine())
     , m_lineBoxContain(RenderStyle::initialLineBoxContain())
     , m_imageRendering(RenderStyle::initialImageRendering())
     , m_textUnderlinePosition(RenderStyle::initialTextUnderlinePosition())
     , m_rubyPosition(RenderStyle::initialRubyPosition())
     , m_touchActionDelay(RenderStyle::initialTouchActionDelay())
+    , m_subtreeWillChangeContents(false)
     , hyphenationLimitBefore(-1)
     , hyphenationLimitAfter(-1)
     , hyphenationLimitLines(-1)
     , m_tabSize(RenderStyle::initialTabSize())
     , tapHighlightColor(RenderStyle::initialTapHighlightColor())
 {
 }
 
 StyleRareInheritedData::StyleRareInheritedData(const StyleRareInheritedData& o)
     : RefCounted<StyleRareInheritedData>()
@@ skipping 35 matching lines @@
     , m_textAlignLast(o.m_textAlignLast)
     , m_textJustify(o.m_textJustify)
     , m_textOrientation(o.m_textOrientation)
     , m_textIndentLine(o.m_textIndentLine)
     , m_textIndentType(o.m_textIndentType)
     , m_lineBoxContain(o.m_lineBoxContain)
     , m_imageRendering(o.m_imageRendering)
     , m_textUnderlinePosition(o.m_textUnderlinePosition)
     , m_rubyPosition(o.m_rubyPosition)
     , m_touchActionDelay(o.m_touchActionDelay)
+    , m_subtreeWillChangeContents(o.m_subtreeWillChangeContents)
     , hyphenationString(o.hyphenationString)
     , hyphenationLimitBefore(o.hyphenationLimitBefore)
     , hyphenationLimitAfter(o.hyphenationLimitAfter)
     , hyphenationLimitLines(o.hyphenationLimitLines)
     , locale(o.locale)
     , textEmphasisCustomMark(o.textEmphasisCustomMark)
     , m_tabSize(o.m_tabSize)
     , tapHighlightColor(o.tapHighlightColor)
     , appliedTextDecorations(o.appliedTextDecorations)
 {
@@ skipping 43 matching lines @@
         && textEmphasisFill == o.textEmphasisFill
         && textEmphasisMark == o.textEmphasisMark
         && textEmphasisPosition == o.textEmphasisPosition
         && m_touchActionDelay == o.m_touchActionDelay
         && m_textAlignLast == o.m_textAlignLast
         && m_textJustify == o.m_textJustify
         && m_textOrientation == o.m_textOrientation
         && m_textIndentLine == o.m_textIndentLine
         && m_textIndentType == o.m_textIndentType
         && m_lineBoxContain == o.m_lineBoxContain
+        && m_subtreeWillChangeContents == o.m_subtreeWillChangeContents
         && hyphenationString == o.hyphenationString
         && locale == o.locale
         && textEmphasisCustomMark == o.textEmphasisCustomMark
         && quotesDataEquivalent(o)
         && m_tabSize == o.m_tabSize
         && m_imageRendering == o.m_imageRendering
         && m_textUnderlinePosition == o.m_textUnderlinePosition
         && m_rubyPosition == o.m_rubyPosition
         && dataEquivalent(listStyleImage.get(), o.listStyleImage.get())
         && dataEquivalent(appliedTextDecorations, o.appliedTextDecorations);
 }
 
 bool StyleRareInheritedData::shadowDataEquivalent(const StyleRareInheritedData& o) const
 {
     return dataEquivalent(textShadow.get(), o.textShadow.get());
 }
 
 bool StyleRareInheritedData::quotesDataEquivalent(const StyleRareInheritedData& o) const
 {
     return dataEquivalent(quotes, o.quotes);
 }
 
 } // namespace WebCore